feat: chain tags

possibility of tagging Chains (eg: earthquake > NaturalDisaster + Eco + Negative )

available tags: Positive, Negative, Company, Disaster, Eco

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Original reflexion:

#### tags idea
outcome tags: Positive, Negative, (and optionally) Extremely positive, Extremely negative
general: Eco, Ship, Sensors, Company

we should restrict new tag, and try to not create too many of them

#### tags impact
we could add an additional Effect:
- TagX increased probability
- or TagX decreased probability

example: maybe a Company Chain, would resolve to your manager being mad at you, increasing probability in the next turns to trigger other Company + Negative Chains

##### posibilities
We could use Tags in the future to add additional chain behaviours
we could use them to UNLOCK new Tiers of chains
to unlock sets of Chains related to a topic (IA, GenomeModification)

example: you did too much decisions degrading the ecosystem, and now you unlock a SpecialTemporaryEffect (an additional Feature) called EcosystemApocalypse, that triggers a lot of Negative + Environnement Chains

No files, tests, or entry points are specified. Start by locating where Chains are defined and where chain outcomes/effects are computed in the TypeScript game logic, then trace any validation/configuration flow that could enforce allowed tags. Identify where probabilities are currently stored or adjusted so TagX effects can be implemented. A good stopping point is a clear tag model (with restricted allowed tags) and observable chain behavior changes tied to those tags.

Rédigé par le modèle d'indexation à partir du texte de l'issue.